Oswald lofflee



PATENTED FEB. 23, 1904.

O. LFFLER.

FILTER.

APPLIOATION FILED JUNE 9, 190s.

No MODEL.

l l l l l l f,

t l l t O O l i l t t l t t l t l O t 7 0 t wzzesses rn: "mms mus cov. PMnTaLmw. wnsumoow. u. c.

UNITED STATES Patented February 23, 1904.

PATENT OFFICE.

FILTER.

SPECIFICATION forming part of Letters Patent o. 752,698, dated February 23, 1904.

Application filed .T une 9, 1903.

To all wiz/0m t may concern:

Be it known that I, OSWALD LFFLER, a subject of the Emperor of Austria-Hungary, and a resident of Vienna, Austria-Hungary, have invented certain new and useful Improvements in Filters, of which the following is a specification.

The present invention has reference to improvements in filters, and relates more especially to improvements in that class of filters in which the filtering material is oated upon a carrying-surface and the filtrate enters the filter-casing through side openings; and the object of the invention is to obtain a relatively large filtering-surface within a comparatively small filter-casing upon which the filtering medium will evenly spread.

According to this invention the surface intended to carry the filtering material is vaulted or domed and is provided with a plurality of openings, over each of which a profuselyperforated hollow semisphere or cup is arranged. The filtering material iioats evenly upon and about these semispheres, and a much larger filtering area is obtained than if' the iiltering-surface were plane.

In the ,accompanying drawing is shown a vertical sectional elevation of a filter according to the'present invention.

The filter-casing, as shown by way of eX- ample, is cylindrical in shape and provided with a bottom b and tap c. Within the casing is provided the vaultedintermediate bottom Z with a plurality of openings. Above this bottom d is arranged the correspondingly-vaulted surface j', which carriesthe semispheres g. These latter may be retained in the surface f Serial No. 160,749. (No model.)

by means of their flanged rim catching underneath the said surface or in any other suitable manner and are prevented from falling through by the underlying intermediate bottom d, which in turn is secured to the carryingsurface f by means of screw-bolts la, threads 7L', or the like. The filtrate enters the iiltercasing through side openings 7.1.

Thedescribed construction allows of readily disconnecting the various parts for repairing or cleaning purposes.

What I claim isl. A filter, comprising a casing with influxopenings, a bottom thereto, a tap in said bottom, an intermediate, vaulted and perforated bottom, a carrying-surface above said inter'- mediate bottom, a plurality of perforated cups, and means for readily securing said cups between said carrying-surface and said intermediate bottom and disconnecting them again, substantially as and for the purpose set forth.

2. A filter comprising a casing with influx and efiiuX openings, a bottom, an intermediate perforated bottom, a carrying-surface above said bottom provided with openings, and a plurality of fianged perforated inverted cups passed upward into said openings and held by their flanges between the perforated bottom and carrying surface, substantially as set forth.

In witness whereof I have hereunto set my hand in presence of two witnesses.

OSWALD LFFLER.

Witnesses:

` MAX HAUssER,

ALvEs'ro S. HoeUE. 

